Question

place 20 pennies on the table in a row. Now replace every fourth coin wit a nickel. Now replace every third coin with a dime. Now repace every sixth coin with a quarter. What is the value of the 20 coins now on the table?

Answer 1

Help someone

Answer 2

if it was me, i would get some change and do it

Answer 3

i will try and see what i get

Answer 4

I got $1.35

Answer 5

i didn't

Answer 6

i got $1.53

Answer 7

my coins looked like
p p d n p q d n p p d q p p d n p q d n

Answer 8

8 pennies, 4 nickels, 5 dimes, 3 quarters

Answer 9

try again, because i do not guarantee that i did not make a mistake

Answer 10

20/4 = 5
5 of the pennies will be replaced by nickles

20/3 = 6.6 repeating, round down to 6
3 and 4 share the multiple 12, and 18, so two of your nickles are replaced with dimes
you now have 11 pennies, 3 nickles, and 6 dimes

20/6 = 3.3 repeating, round down to 3
3 and 6 share the multiples 6, 12, and 18
12 is a dime, and 18 is a dime

you have 11 pennies, 2 nickles, 4 dimes, and 3 quarters
\[(11*1) + (2*5) + (4+10) + (3*25) = $1.36\]

Answer 11

how can you have repeating decimal money?

Answer 12

you don't, you have uneven division which you round off; that's why I rounded all of the numbers down rather than to the nearest digit.

Answer 13

I rounded the number of coins, not the amount of money. :P

Answer 14

?

Answer 15

how can you have a fractional number of coins?

Answer 16

you replace every 6th coin with a quarter
20/6 = 3.333 coins replaced
you can only add 3 coins, because the fourth would land on 24, so you round it off.

Answer 17

i just got out some change and did it again
i got $1.30 this time
once more

Answer 18

I'm gonna run the math one more time, 1 sec

Answer 19

finally!
i got $1.35 just like @Mindless143

Answer 20

coins # 4,8,16,20 are nickles
coins # 3,9,15 are dimes
coins # 6,12,18 are quarters
10 pennies, 4 nickles, 3 dimes, 3 quarters

\[10 + (4*5)+(3*10)+(3*25) = $1.35\]
so $1.35 was correct, I missed a coin or two apparently.